Photosynthesis &
Respiration
WHAT DO PLANTS
NEED FOR
PHOTOSYNTHESIS?
Photosynthesis
1.Chloroplasts trap
light energy.
Water enters leaf
through xylem.
CO2 enters leaf
through stomata.
-PRESTO CHANGO!
2. Sugar exits leaf
through phloem.
Oxygen exits leaf
through stomata.
Photosynthesis
1.Chloroplasts trap
light energy.
Water enters leaf
through xylem.
CO2 enters leaf
through stomata.
-PRESTO CHANGO!
2. Sugar exits leaf
through phloem.
Oxygen exits leaf
through stomata.
What was that chemical reaction?
• Water, carbon dioxide
• Presto-Chango
• Sugar, oxygen
DOES ANYTHING ELSE MAKE
ITS OWN FOOD USING
PHOTOSYNTHESIS?
Note Set #1
1 What do plants need for photosynthesis?
2 What do plants make?
3 What traveled through stomata?
4 What traveled through vascular tissues?
5 What traveled through space?
6 What organisms photosynthesize?
What is the equation for the
chemical reaction of
photosynthesis?
What is the equation for the
chemical reaction of
photosynthesis?
Six molecules of carbon dioxide react with six
molecules of water to form 1 molecule of glucose
and six molecules of oxygen.
Photosynthesis
• The process of changing light energy into
chemical energy
• Energy is stored as sugar
• Occurs in plants, algae, some protists, and
some bacteria
• Takes place in the chloroplasts of cells, using
chlorophyll, the green pigment in plants
• .
What happens during
photosynthesis?
• Chlorophyll of plants captures light energy and
use that energy to change molecules of carbon
dioxide and water into glucose and oxygen
What happens during
photosynthesis?
• Carbon dioxide enters the leaf through holes called
stomata . Oxygen goes out the same holes.
• CO2 combines with water through a chemical reaction
to make glucose (a sugar) and oxygen (a waste
product)
• The sugar is moved through tubes (phloem) in the
leaf to the roots, stems and fruits of the plants
• Some of the sugar is used right away by the plant for
energy; some is stored as starch; and some is built
into plant tissue
• .
Note Set #2
7. What is the equation for the chemical reaction of photosynthesis?
8. Photosynthesis--The process of changing __________ _________ into
___________________ energy
9. Energy is stored as ______
10. Occurs in plants, algae, some protists, and _________ bacteria
11. Takes place in the ___________ of cells, using ____________, the green pigment
in plants
12. What happens during photosynthesis? _______________ of plants captures light
energy and use that energy to change molecules of ____________and
____________ into _____________ and ________________
13. Carbon dioxide _______________ the leaf through holes called stomata . Oxygen
_______________ _______________ the same holes.
14. _______________ combines with _______________ through a chemical reaction
to make _______________ (a sugar) and _______________ (a waste product)
15. The sugar is moved through tubes (_______________) in the leaf to the
_______________, stems and _______________ of the plants
16. Some of the _______________ is used right away by the plant for energy; some is
stored as _______________; and some is built into _______________
_______________
Why is this important to us?
• Plants are producers, the first step in the food
chain.
• We cannot make our own food; we must get
our food from plants.
Why is this important to us?
• The oxygen released during photosynthesis is
necessary for almost all living things.
• Oxygen enters the human through holes called
mouth and nose. Carbon dioxide goes out the
same holes.
This can happen because...
• Carbon dioxide enters the leaf through holes
called stomata . Oxygen goes out the same
holes.
More about stomata—Transpiration
• Unfortunately for most plants, water vapor
escapes from leaves through the stomata. This
is called transpiration.
• Guard cells surround the stomata and close
them at times to prevent too much water loss.
So photosynthesis is
required for respiration, and
vice versa.
Learn more about photosynthesis at:
http://www.ftexploring.com/me/photosyn1.html
Note Set #3
17.
Why is this important to us? Plants are _______________, the
first step in the food chain.
18.
We cannot make our own food; we must get our food from
_______________.
19.
The oxygen released during photosynthesis is necessary for
_______________ _______________ _______________
_______________.
20.
Oxygen _______________ the human through holes called
_______________ and _______________. Carbon dioxide
_______________ _______________ the same holes.
21.
This can happen because...Carbon dioxide _______________
the leaf through holes called stomata . Oxygen _______________
_______________ the same holes.
22.
So _______________ is required for _______________, and
vice versa.
Learn more about photosynthesis at:
http://www.ftexploring.com/me/photosyn1.html
What is Cellular Respiration?
The release of chemical energy for use by cells.
What is Cellular Respiration?
• Once the energy that was in sunlight is
changed into chemical energy (glucose) by
photosynthesis, an organism has to transform
the chemical energy into a form that can be
used by the organism.
• This process is cellular respiration.
• We need respiration because we can’t use
sunlight to move our cells and bodies.
• .
Cellular Respiration
• The breakdown of glucose molecules to
release energy
• Takes place in all organisms (though some
organisms don’t use oxygen. You will study
those in high school biology.)
• Respiration, like photosynthesis, is a step-bystep process.
• .
What is the chemical equation for
cellular respiration?
Note Set #4
24.
What is Cellular Respiration? The release of
_______________ _______________ for use by _______________.
25.
What is Cellular Respiration? Once the energy that was in
sunlight is changed into chemical energy (_______________) by
_______________, an organism has to transform the chemical
energy into _______________ _______________ that can be used
by the organism.
26.
This process is _______________ _______________.
27.
We need respiration because we can’t use sunlight to move our
cells and bodies.
28.
Cellular Respiration: The _______________ of glucose
molecules to _______________ energy
29.
Cellular respiration takes place in _______________
organisms (though some organisms don’t use oxygen. You will
study those in high school biology.)
30.
Respiration, like _______________, is a step-by-step process.
31.
What is the chemical equation for cellular respiration? (Use
words or chemical symbols.)
How do the chemical reactions of photosynthesis
and respiration complement each other?
• The products of one process are the reactants of the
other.
How do the chemical reactions of
photosynthesis and respiration
complement each other?
(glucose)
• The products of one process are the reactants of the
other.
• Do you see the reversal?
Note Set #5 –Review
32. How do the chemical reactions of
photosynthesis and respiration complement
each other?
33. The _______________ of one process are
the _______________ of the other.
34. Do you see the reversal?
35. What related questions do you still have?